111212221011101 has 8 divisors (see below), whose sum is σ = 127659591647040. Its totient is φ = 94904827998048.

The previous prime is 111212221011079. The next prime is 111212221011103. The reversal of 111212221011101 is 101110122212111.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-111212221011101 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 111212221011101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111212221011103) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 34994404016 + ... + 34994407193.

It is an arithmetic number, because the mean of its divisors is an integer number (15957448955880).

Almost surely, 2^{111212221011101} is an apocalyptic number.

It is an amenable number.

111212221011101 is a deficient number, since it is larger than the sum of its proper divisors (16447370635939).

111212221011101 is an equidigital number, since it uses as much as digits as its factorization.

111212221011101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69988811443.

The product of its (nonzero) digits is 16, while the sum is 17.

Adding to 111212221011101 its reverse (101110122212111), we get a palindrome (212322343223212).

The spelling of 111212221011101 in words is "one hundred eleven trillion, two hundred twelve billion, two hundred twenty-one million, eleven thousand, one hundred one".